SEISMIC GROUND RESPONSE ANALYSIS FOR LIQUEFACTION ASSESSMENT IN BUNAKEN, NORTH SULAWESI, INDONESIA

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R E Majid 1,2, F Faris1*, A Rifa’i1

1Department of Civil and Environmental Engineering, Faculty of Engineering, Universitas Gadjah Mada, Yogyakarta 55281, Indonesia

2PT Nindya Karya (Persero), Gedung Nindya, East Jakarta 13630, Indonesia

1*Corresponding author: [email protected]

DOI: https://doi.org/10.20885/icsbe.vol4.art30

ABSTRACT

Bunaken Island is a quaternary deposit of Holocene age. Dominating sand layers, shallow groundwater table, and near active fault locations make the area highly susceptible to liquefaction. This study aims to determine the minimum ground acceleration that can potentially trigger liquefaction in the area. In this study, earthquakes originating in the North Sulawesi Thrust were modelled with various magnitudes. PGA was calculated using the attenuation function from : Liu and Tsai (2005), Abrahamson et al. (2016), Atkinson and Boore (2003), and Zhao et al. (2006). Each earthquake parameter was analyzed for its liquefaction potential using the simplified procedure by Idriss and Boulanger (2008), and then the minimum earthquake parameter value that can cause liquefaction was determined. The analyses show that the study site has the potential for liquefaction if more than Mw 5.8 earthquake occurs with a PGA value of above 0.17g. The BKN-BH02 borehole is the most critical point of the four boreholes made at the study site.

 

Keywords: seismic, ground response, liquefaction

 

REFERENCES

Warouw A G D Manoppo F J and Rondonuwu S G, 2019 Analisis potensi likuifaksi dengan menggunakan nilai SPT (Studi kasus : Jembatan Ir. Soekarno Manado) J. Sipil Statik 7, 11 p. 1453–1464.

Tijow K C Sompie O B A and Ticoh J H, 2018 Analisis potensi likuifaksi tanah berdasarkan data standart penetration test (SPT) Studi kasus : Dermaga Bitung, Sulawesi Utara J. Sipil Statik 6, 7 p. 491–500.

Mase L Z Farid M Sugianto N and Agustina S, 2020 The Implementation of Ground Response Analysis to Quantify Liquefaction Potential Index (LPI) in Bengkulu City, Indonesia J. Civ. Eng. Forum 6, 3 p. 319.

Google, 2020, Google Earth. [Online]. Available: https://earth.google.com/web. [Accessed: 15-Feb-2022].

Pusat Studi Gempa Nasional, 2017 Peta sumber dan bahaya gempa Indonesia tahun 2017 1st ed. Jakarta: Pusat Penelitian dan Pengembangan Perumahan dan Permukiman, Badan Penelitian dan Pengembangan, Kementrian Pekerjaan Umum dan Perumahan Rakyat.

Effendi A C and Bawono S S, 1997, Geological Map of The Manado Sheet, North Sulawesi.

Hall R Cottam M A and Wilson M E J, 2011 The SE Asian gateway: history and tectonics of Australia-Asia collision Geol. Soc. London Spec. Publ. p. 355.

Socquet A et al., 2006 Microblock rotations and fault coupling in SE Asia triple junction (Sulawesi, Indonesia) from GPS and eartquake slip vector data J. Geophys. Res. Solid Earth 111, B8.

Seed H B and Idriss I M, 1971 A simplified procedure for evaluating soil liquefaction potential November Berkeley, California: National Technical Information Service.

Santucci de Magistris F G L F F and Fabbrocino G, 2013, A database for PGA threshold in liquefaction occurrence, in Soil Dynamics Earthquake, p. 17–19.

Soilens, 2021, Penyelidikan tanah untuk Proyek Kawasan Pantai Malalayang dan Penataan Ecotourism Village Bunaken, Sulawesi Utara, Bandung.

Badan Geologi, 2019 Atlas zona likuefaksi Indonesia Jakarta: Badan Geologi.

Liu K S and Tsai Y B, 2005 Attenuation relationships of PeakGround Acceleration and Velocity for crustal earthquakes in Taiwan. Bull. Seismol. Soc. Am. 95, 3 p. 1045–1058.

Abrahamson N Gregor N and Addo K, 2016 BC Hydro ground motion prediction equations for subduction earthquakes Earthq. Spectra 32, 1 p. 23–44.

Atkinson G M and Boore D M, 2003 Earthquake Ground-Motion Relations for Subduction Zone Eartquake And Their Applictaion to Cascadia and Other Regions Bul. Seismol. Soc. Am. 4, 93 p. 1703–1729.

Zhao J X et al., 2006 An emirical site-classification method for strong-motion stations in Japan using H/V response spectral ratio Bull. Seismol. Soc. Am. 96, 3 p. 914–925.

Pramaditya A and Fathani T F, 2020 Physical Modelling of Earthquake-induced Liquefaction on Uniform Soil Deposit and Settlement of Earth Structures J. Civ. Eng. Forum 1000, 1000 p. 85–96.

Mase L Z, 2018 Studi kehandalan metode analisis likuifaksi menggunakan SPT akibat gempa 8,6 Mw, 12 September 2007 di area pesisir Kota Bengkulu J. Tek. Sipil 25, 1 p. 53.

Idriss I M and Boulanger R W, 2008 Soil liquefaction during eartquake 14th ed. Oakland, California, USA: EERI Publication.

William T Whitman and Robert V, 1962 Soil Mechanics .

Badan Standardisasi Nasional, 2019 SNI Tata cara perencanaan ketahanan gempa untuk struktur bangunan gedung dan nongedung 1st ed., 8 Jakarta: Badan Standardisasi Nasional.

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Iwasaki T Tadhasi A and Tokida K, 1984 Simplified procedures for assessing soil liquefaction during earthquakes p. 49–58.

 

THE APLICATION OF URBAN INFILL TECHNIQUE ON BUILDING CONCERVATION METHOD WITH A CASE STUDY OF JAVA TRADITIONAL HOUSE IN YOGYAKARTA

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T K Wibisono[1]*

 

1 University Islam Indonesia, Yogyakarta, Indonesia

[1]* Corresponding author’s email: [email protected]

DOI: https://doi.org/10.20885/icsbe.vol4.art29

 

ABSTRACT

The rapid development of the city tends to create new strategic value in the area so as to encourage changes / shifts in the function of the area and often sacrifice the existence of old buildings in the area. Most of these old buildings were changed/demolish without regard to the historical value and uniqueness of the building/area or genius loci to be converted into new buildings with new functions only because of the reason for the investment value of the new commercial function of the property. Without realizing it, this building change will change the value of the area that has been formed so that the sustainability aspect of the old area stops and loses direction. There are several technical factors of the old building, such as: lay-out / spatial planning, appearance and use of old building materials that do not keep up with the times are often the main causes of this demolition. This demolition problem can actually be reduced in intensity by using the old building revitalization method that applies the urban infill technique of new buildings on the old building site. By using this technique, the existence of the old building can still be maintained while synergizing with the infill building on the new/updated function. However, it is necessary to pay attention to several important factors that determine the application of this urban infill technique, which in this paper tries to reveal what technical factors play an important role through a case study of the application of urban infill in old Javanese traditional houses. The results obtained are several design directions that need to be considered in the application of urban infill building techniques.

 

Keywords: urban infill techniques, building concervation, java traditional house

 

REFERENCES

Ardiani, Milla. (2009). Insertion : Adding Without Dropping. Surabaya. Wastu Laras Graphics Publisher.

Budiharjo, Eko. (1997). Architecture Development and Conservation, Jakarta. Djambatan Publisher.

DIY Culture Office. (2015). Association of Yogyakarta Special Region Government Regulations Regarding Cultural Heritage and Cultural Conservation From 2012-2014.Yogyakarta. DIY Culture Office.

Robert, Philip. (1989). Adaptations : New Uses For Old Buildings. New York. Publisher Princeton Architectural Press.Inc.

INVESTIGATING THE EFFECTIVENESS OF BANGER RIVER FLOODWAY ON REDUCING WATER LEVEL OF LOJI RIVER IN PEKALONGAN CITY USING HEC-RAS 1D MODEL

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E O Nugroho[1]*, R Ramadhani2, P Lutfitiana3, M Cahyono1, S Lestari4, and YKumala5

 

1 Institute Teknologi Bandung

2 Sumatera River Basin VI, Ministry of Public Works and Housing, Jambi

3 Directorate General of Water Resources, Ministry of Public Work

4 Directorate of Dams and Lakes, Directorate General of Water Resources

5 Research Center for Water Resources, Ministry of Public Works and Housing

 

[1]* Corresponding author’s email: [email protected]

DOI: https://doi.org/10.20885/icsbe.vol4.art28

 

ABSTRACT

Pekalongan City is a lowland area and located in the northern part of Java Island. Tidal flooding often occurred at high tide when the wave run-up entered the mainland and inundated several areas in the city of Pekalongan. The inundation area in Pekalongan City reached 618 Ha in 2020. Tidal flooding became a problem because it inundated vital areas such as residential areas, public spaces, and economic centers. The area that often experiences inundation is in the area of the Loji River and the Banger River estuarine, which is a unified system on the Pekalongan River. The inundation due to tidal flooding will be more severe if it coincided with the occurrence of high discharge in the river flow. To control floods and tidal floods in the city of Pekalongan, flood control engineering was needed so a floodway known as the Banger River was built. This approach aims to reduce the area of inundation and protect existing vital areas. This study aims to assess the impact of the Banger River  on reducing water level in the Loji River. The methodology used in this study is flood modeling with HEC-RAS 6.1 one dimensional model. The simulation results show that after the Banger river floodway was made, the water level in the Loji river 1.7 meters or 28% of the water level in the Loji River can be reduced.

 

Keywords: Banger River, Floodway, HEC-RAS

 

REFERENCES

Arturo Leon, (2013). Tutorial on Using HECGeo RAS 10.1 with Arc GIS 10.1 and HEC-RAS 4.1.0 for Flood Inundation Mapping in Steady and Unsteady Flow Conditions, School of Civil and Construction Engineering, Oregon State University.

BBWS Pemali Juana, Review Detail Desain Pengendalian Banjir dan Rob Kota dan Kab. Pekalongan, 2020, Indonesia.

Chow V.T., Maidment D.R., Mays L.W., 1988, Applied Hydrology, Mc. GrawHill Book Company, Singapore.

Grimaldi, Salvatore, etl., 2013, Flood Mapping in Ungauged Basins Using Fully Continuous HydrologicHydraulic Modeling. Journal of Hydrology, Elsevier, 487, 39-47

Riza Inanda Siregar, Ivan Indrawan., 2017, Comparative Study of 1-D (One Dimension) and 2-D (Two Dimension) Modeling in Modeling Flood in Hulu Citarum Watershed., Jurnal Education building., Volume 3, Nomor 2, December 2017: 31-37.

Rahmawati, I. P., & Ardhiani, N., 2008, Flood Control System of Sengkarang River. Doctoral dissertation, Faculty of Engineering Diponegoro University.

US ARMY Corps of Engineers. (2010). HECRAS River Analysis System: User’s Manual. US Army Corps of Engineers, Washington.

 

 

THE IMPLICATION RISK-IMPACT OF PROJECT ACCELERATION ON PAVEMENT RUNWAY

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A Suraji1, F Nugraheni1, and T N Sulistyantoro[1]*

 

1 Master Civil Engineering, University Islam Indonesia, Yogyakarta, Indonesia

[1]* Corresponding author’s email: tri.nugroho.sulistyantoro@uii.ac.id

DOI: https://doi.org/10.20885/icsbe.vol4.art27

 

ABSTRACT

The process of building a new Yogyakarta airport in Kulon Progo District or New Yogyakarta International Airport (NYIA) continues to accelerate. The document on the analysis of environmental impacts (Amdal) is still in the process of preparation. Airport development, has implications for productive land grabbing, settlement evictions, lost probability at the site plan and at the location of supporting infrastructure. In fact, there was no study on tsunami risk reduction in the formulation of environmental impact (Amdal), so there is no guarantee of safety. On the analysis of the risk probability in the pavement runway project is divided into five probabilities of risk for three samples. In calculating risk, it is divided into three project acceleration assumptions, namely the assumption of a duration of 50% or 7 weeks, 40% or 6 weeks and 25% or 4 weeks from normal duration 14 weeks. Risk probability is obtained from the probability of the event and the probability of the impact. The highest loss is in 4 weeks duration (25% assumption) where has a total loss 308,638,309.40 rupiahs. The smallest loss is in normal duration 14 weeks where has a total loss 108,444,489.74 rupiahs. the relationship between probability and project acceleration is found. Where, there is an increase in the probability of a duration of 4 weeks by 0.17459% and a decrease in the probability of a normal duration of 14 weeks by 0.0618%.

 

Keywords: risk impact, pavement runway, risk probability

 

REFERENCES

Project Management Institute 2013 A Guide to the Project Management Body of Knowledge PMBOK Guide

Fisk, E.R. (1997). Construction Project Administration. Prentice all, New Jersey, USA

Kangari, R. (1995). ”Risk Management Perceptions and Trends of U.S. ] Construction.” Journal of Construction Engineering and Management. ASCE. 121.

Al-Bahar, J.F. & Crandall, K.C. (1990). “Systematic Risk Management Approach for Construction project”. Journal of Construction Engineering and Management.ASCE. 161.

  1. Munier, Risk Management for Engineering Projects. Spain: Springer International Publishing Switzerland, 2014.
  2. S. Alizadeh and P.Moshashaei, “The Bowtie method in safety management system,” Sci. J. Rev., 2015.

Long and et al, “Delay and Cost Overruns in Vietnam Large Construction Project: A Comparison with Other Selected Countries Korean Society of Civil Engineering,” J. Civ. Eng., vol. 12, 2008.

Smith, R.G. & Bohn, C.M. (1999).”Small To Medium Contractor Contingency and Assumtion of Risk.” Journal of Construction Engineering and Management.ASCE. 125.

Kerzner, Harold, Ph.D. (1995). “Risk Management.” Project Management ; A Systems Approach to Planning, Scheduling, and Controling. Van Nostrand reinhold, USA.

 

RELATIONSHIP ANALYSIS BETWEEN OPTIMIZATION UNSIGNALIZED JUNCTION AND FUEL CONSUMPTION (Case Study: Degolan Junction, Sleman, Yogyakarta)

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M Kennyzyra[1]* and M A Hadi1

 

1 Department of Civil Engineering, University Islam Indonesia, Yogyakarta, Indonesia

[1]* Corresponding author’s email: [email protected]

DOI: https://doi.org/10.20885/icsbe.vol4.art26

 

ABSTRACT

Application of signalling at junction can make the delay time longer. The delay time at the junction will be related to the amounZt of fuel consumption of vehicles. In this study, research will be conducted on delays with fuel consumption at the Degolan Junction. The purpose of this study was to determine the comparison of vehicle fuel consumption between the unsignalized junction and signalized junction. Junction performance analysis was carried out based on IHCM 1997. The fuel consumption analysis is carried out based on the length of the delay using the equation from LAPI-ITB. Furthermore, data analysis was carried out using linear regression analysis. Based on the results of the analysis, it was found that the average fuel consumption at the Degolan Junction when the junction conditions were not signalled was 9.553 liters/junction. Meanwhile, when signalling is applied to the Degolan junction with details, alternative 1 produces an average fuel consumption of 40,144 liters/ junction, alternative 2 produces an average fuel consumption of 40,646 liters/ junction, and alternative 3 produces an average fuel consumption of 39,937 liters/junction. The results of the analysis show that the performance of the junction in the form of delay has an influence on fuel consumption.

 

Keywords: fuel consumption, intersection, delay time

 

REFERENCES

Badan Pusat Statistik D.I.Yogyakarta 2022 Provinsi Daerah Istimewa Yogyakarta Dalam   Angka. (Yogyakarta: Penerbit Badan Pusa Statistik Provinsi D.I. Yogyakarta).

Sriwati, Said L B, and Maryam, H 2019 pengaruh pertumbuhan kendaraan dan kapasitas jalan terhadap kemacetan di Ruas Jalan Perintis Kemerdekaan Jurnal Ilmiah Nasional, Vol. 3, No. 1, 79-86.

Munawar A 2006 Manajemen Lalu Lintas Perkotaan. (Yogyakarta: Beta Offset).

Direktorat Jenderal Bina Marga 1997 Manual Kapasitas Jalan Indonesia (Jakarta: Penerbit Bina Marga)

Iduwin T and Purnama D D 2018 evaluasi kinerja simpang tak bersinyal (studi kasus : Simpang Tiga Jambu Jl. Raya Duri Kosambi) Jurnal Forum Mekanika, Vol. 7, No. 2, 111-116.

Putra, A P 2012 Analisis Hubungan Kinerja Simpang Bersinyal Terhadap Konsumsi Bahan Bakar di Kota Surakarta Skripsi (Surakarta: Universitas Sebelas Maret)

Julianto E N 2007 Analisis Kinerja Simpang Bersinyal Simpang Bangkong dan Simpang Milo Semarang Berdasarkan Konsumsi Bahan Bakar Minyak Tesis (Semarang: Universitas Dipenogoro)

Khafidz L, Sumarsono A, and Amirotul MHM 2016 hubungan tundaan dan panjang antrian terhadap konsumsi bahan bakar minyak pada lajur pendekat simpang (Studi Kasus Pada Jalan Arteri Kota Surakarta) Jurnal Matriks Teknik Sipil. 774-780.

Fhadil M 2019 Analisis Simpang Bersinyal dan Hubungan Panjang Antrian dan Waktu Tundaan Terhadap Konsumsi Bahan Bakar Minyak (Studi Kasus: Simpang Bersinyal UPN Yogyakarta) Tugas Akhir (Yogyakarta: Universitas Islam Indonesia)

Sinambela T P, Kumaat M, and Pandey S V 2021 analisa hubungan kinerja simpang bersinyal dengan konsumsi bahan bakar (Studi Kasus: Simpang Jl. A.A. Maramis-Jl. Ringroad II) Jurnal TEKNO, Vol. 19, No. 78, 159-170.

Isnaeni M 2003 Efek Lingkungan Interaksi Transportasi dan Tata Ruang Kota Tesis (Bandung: Institut Teknologi Bandung)

Republik Indonesia 2015 Peraturan Menteri Perhubungan No. 96 Tahun 2015 tentang Pedoman Pelaksanaan Manajemen dan Rekayasa Lalu Lintas.

EXCAVATABILITY METHOD BASED ON ENGINEERING GEOLOGY CONDITIONS IN THE CONSTRUCTION OF RUKOH DAM SUPPLETION TUNNEL, INDONESIA

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Z B Harwinda1,2,W Wilopo[1]* and I G B Indrawan1

 

1 Department of Geological Engineering, Universitas Gadjah Mada, Yogyakarta, Indonesia

2 Ministry of Public Works and Housing, Jakarta, Indonesia

[1]* Corresponding author’s email: [email protected]

DOI: https://doi.org/10.20885/icsbe.vol4.art25

 

ABSTRACT

Determination of excavation technique was one of the essential factors in tunnel construction stability. It also had an impact on the efficiency of the construction phase. However, in the Detail Engineering Design of the Rukoh Dam Suppletion Tunnel, there was no study of the most optimal excavation technique in the construction phase. This study aimed to assess the efficiency of excavation capabilities based on engineering geology conditions. The parameters used in this study are RMR values, GSI values, If-index (discontinuity spacing), Point Load (Is50) values, and Excavation Power Index (EPI). The excavatability classification used the method developed by Abdullatif and Cruden, Pettifer and Fookes, and Tsiambaos and Saroglou. The procedure for evaluating efficiency used the EXCASS system. The tunnel’s rock mass quality was poor calcareous siltstone. The excavation method in the tunnel was the top heading and bench with a stand-up time of 10 hours for a 2.5 m span. Based on the result, the most optimal excavation technique used was the easy ripping method for zones 1 and 4, while the digging method was for zones 2, 3, and 5. Even though the recommendations were classified, project cost efficiency studies are required to bolster the recommendations.

 

Keywords: excavation technique, rukoh dam suppletion tunnel, EXCASS system

 

REFERENCES

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Badan Pusat Statistik D.I.Yogyakarta 2022 Provinsi Daerah Istimewa Yogyakarta Dalam   Angka. (Yogyakarta: Penerbit Badan Pusa Statistik Provinsi D.I. Yogyakarta).

Bieniawski Z T 1989 Engineering rock mass classifications: a complete manual for engineers and geologists in mining, civil, and petroleum engineering (New York: John Wiley & Sons)

Chen Z, He C, Yang W, Guo W, Li Z, and Xu G 2020 Impact of geological conditions on instability causes and mechanical behavior of large-scale tunnels: a case study from the Sichuan–Tibet highway Bulletin of Engineering Geology and the Environment

Dagdelenler G 2021 Comparison of the efficiency evaluations of selected excavatability classifications for rock masses Arabian Journal of Geosciences 14 1281

Dagdelenler G, Sonmez H, and Saroglou 2020 A flexible system for selection of rock mass excavation method Bulletin of Engineering Geology and the Environment 79: 5355–5369

Deere D U 1963 Technical Description of Rock Cores for Engineering Purpose Rock Mechanics and Engineering Geology 1(1): 16-22.

Deere D U and Deere D W 1989 Rock quality designation (RQD) after twenty years (Washington: US Corps of Engineers)

Direktorat Jenderal Bina Marga 1997 Manual Kapasitas Jalan Indonesia (Jakarta: Penerbit Bina Marga)

Fhadil M 2019 Analisis Simpang Bersinyal dan Hubungan Panjang Antrian dan Waktu Tundaan Terhadap Konsumsi Bahan Bakar Minyak (Studi Kasus: Simpang Bersinyal UPN Yogyakarta) Tugas Akhir (Yogyakarta: Universitas Islam Indonesia)

Hoek E. and Brown E T 1997 Practical Estimates of Rock Mass Strength International Journal Rock Mechanics Mining Science 34 1165-1186.

Hoek E, Carter T G, and Diederichs M S 2013 Quantification of the Geological Strength Index Chart Rock Mechanics/Geomechanics Symposium ARMA 672-680.

Iduwin T and Purnama D D 2018 evaluasi kinerja simpang tak bersinyal (studi kasus : Simpang Tiga Jambu Jl. Raya Duri Kosambi) Jurnal Forum Mekanika, Vol. 7, No. 2, 111-116.

Isnaeni M 2003 Efek Lingkungan Interaksi Transportasi dan Tata Ruang Kota Tesis (Bandung: Institut Teknologi Bandung)

ISRM 1978 Suggested Methods for The Quantitative Description of Discontinuities in Rock Masses: International Society for Rock Mechanics. International Journal of Rock Mechanics and Mining Science & Geomechanics 15 319-368

ISRM 1981 Suggested a method rock characterization, testing, and monitoring (Oxford: Pergamon Press)

Julianto E N 2007 Analisis Kinerja Simpang Bersinyal Simpang Bangkong dan Simpang Milo Semarang Berdasarkan Konsumsi Bahan Bakar Minyak Tesis (Semarang: Universitas Dipenogoro)

Kesimal A, Karaman K, Cihangir F, and Erçıkdı F 2018 Excavatability assessment of rock masses for geotechnical studies Handbook of research on trends and digital advances in engineering geology ss.231-256

Khafidz L, Sumarsono A, and Amirotul MHM 2016 hubungan tundaan dan panjang antrian terhadap konsumsi bahan bakar minyak pada lajur pendekat simpang (Studi Kasus Pada Jalan Arteri Kota Surakarta) Jurnal Matriks Teknik Sipil. 774-780.

Khamehchiyan M, Dizadji MR, and Esmaeili M 2014 Application of rock mass Index (RMi) to the rock mass excavatability assessment in open face excavations Geomechanics and Geoengineering 9(1): 63–71

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Mohamad E T, Kassim K A, and Komoo I 2005 An overview of existing rock excavatability assessment techniques Jurnal Kejuruteraan Awam 17(2): 46–59

Munawar A 2006 Manajemen Lalu Lintas Perkotaan. (Yogyakarta: Beta Offset).

Palmström A and Stille H 2010 Rock Engineering (London: Thomas Telford) pp 408

Palmström A 2001 Measurement and characterizations of rock mass jointing In-Situ Characteristic Rocks pp 140

Pettifer G S, Fookes P G 1994 A revision of the graphical method for assessing the excavatability of rock Quarterly Journal of Engineering Geology 27: 145–164

  1. Wahana Adya Konsultan 2019 Detail Engineering Design Bendung Pengarah Bendungan Tiro (Pidie: Balai Wilayah Sungai Sumatera I)
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  3. Waskita Karya (Persero) 2019 Topographic Map of Rukoh Dam Suppletion Tunnel (Pidie : Balai Wilayah Sungai Sumatera I) 1
  4. Waskita Karya (Persero) 2022 Laporan Geologi/Mekanika Tanah Investigasi Tambahan TR1 dan TR2 Bendung Pengarah Rukoh (Pidie: Balai Wilayah Sungai Sumatera I)

Putra, A P 2012 Analisis Hubungan Kinerja Simpang Bersinyal Terhadap Konsumsi Bahan Bakar di Kota Surakarta Skripsi (Surakarta: Universitas Sebelas Maret)

Republik Indonesia 2015 Peraturan Menteri Perhubungan No. 96 Tahun 2015 tentang Pedoman Pelaksanaan Manajemen dan Rekayasa Lalu Lintas.

Sinambela T P, Kumaat M, and Pandey S V 2021 analisa hubungan kinerja simpang bersinyal dengan konsumsi bahan bakar (Studi Kasus: Simpang Jl. A.A. Maramis-Jl. Ringroad II) Jurnal TEKNO, Vol. 19, No. 78, 159-170.

Sriwati, Said L B, and Maryam, H 2019 pengaruh pertumbuhan kendaraan dan kapasitas jalan terhadap kemacetan di Ruas Jalan Perintis Kemerdekaan Jurnal Ilmiah Nasional, Vol. 3, No. 1, 79-86.

Tsiambaos G and Saroglou H 2010 Excavatability assessment of rock masses using the geological strength index (GSI) Bulletin of Engineering Geology and the Environment 69(1): 13–27

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Wang K, Xu S, Zhong Y, Han Z, and Ma E 2021 Deformation failure characteristics of weathered sandstone strata tunnel:  A case study. Engineering Failure Analysis p127

Ya S, Yonghua S, Zhao M, Liu S, and Li X 2018 A case study of the failure of the Liziping tunnel.     Tunneling and     Underground      Space      Technology

SELECTION OF INDIGENOUS N-FIXING RHIZOBACTERIA FROM POST-TIN MINING AREAS

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D Wulandari1*, R Rosita2, A F Maulana3, I Mansur4, Kasam[1]

 

1 Department of Environemntal Engineering, Faculty of Civil Engineering and Planning, Universitas Islam Indonesia, Yogyakarta, IndonesiaJl Kaliurang KM 14, 5 Yogyakarta, Indonesia. 55584

2 SEAMEO BIOTROP, Jl Raya Tajur Bogor 16134, Indonesia

3 Department of Bioresources Technology and Veterinary, Vocational College, Universitas Gadjah Mada, Gedung SV UGM, Sekip Unit 1, Depok Sleman Yogyakarta 55281, Indonesia

4  Faculty of Forestry, IPB University, Dramaga Bogor 16680, Indonesia

[1]* Corresponding author’s email: [email protected]

DOI: https://doi.org/10.20885/icsbe.vol4.art24

ABSTRACT

Tin mining is one industry that contributes to Indonesia’s economic development. However, because tin is always in high demand, this activity creates an environmental problem. Silica sand, the dominant soil in post-tin mining, is easily eroded by water and wind, resulting in soil nutrient deficiency including N. Because this condition makes it difficult for organisms to survive, rehabilitation is essential. Nitrogen (N) is an essential nutrient for plant growth. N-fixing rhizobacteria are well-known for fixing N from the atmosphere, whether through symbiosis or otherwise. The goal of this study was to isolate indigenous N-fixing rhizobacteria from a post-tin mining area. The soybean plant was used as the testing plant. Three types of N-fixing rhizobacteria were isolated from the nodule of Acacia mangium growing in a post-tin mining area: B1, B2, and B3. To minimize the nutrient content in the growth media, the plant was grown in sterilized sand. Inoculated and non-inoculated soybean were grown in a greenhouse for three months without fertilizer. There were seven replications. Among the treatments, B3 had the highest soil and pod N content, best growth performance, nodule formation, and soybean production. This finding suggests that B3 could be used for future rehabilitation in the post-tin mining area.

 

Keywords: post-tin mining, rehabilitation, rhizobacteria. N deficiency

 

REFERENCES

 

Abendroth, L.J., Elmore, R.W., and Ferguson, R.B. 2006. Soybean inoculation: understanding the soil and plant mechanisms involved. University of Nebraska-Lincoln. G1621.

Aasfar, A., Bargaz, A., Yaakoubi, K., Hilali, A., Bennis, I., Zeroual, Y., and Meftah Kadmiri I. 2021. Nitrogen Fixing Azotobacter Species as Potential Soil Biological Enhancers for Crop Nutrition and Yield Stability. Frontiers in Microbiology, 12:628379. http://doi: 10.3389/fmicb.2021.628379

Bassi, D., Menossi, M. & Mattiello, L. Nitrogen supply influences photosynthesis establishment along the sugarcane leaf. Sci Rep 8, 2327 (2018). https://doi.org/10.1038/s41598-018-20653-1

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CO2 BIO-FIXATION POTENTIAL IN POWER PLANT DEVELOPMENT TOWARDS INDONESIA’S DEEP DECARBONIZATION

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RG Dewi1,2, UWR Siagian1,3, KE Prasetya2, SEF Sitanggang5, A Primananda2, VTF Harisetyawan2, IN Ikhsan3, GN Sevie6*

 

1Center for Research on Energy Policy, Institut Teknnologi Bandung, Indonesia

2Center for Research Technology Radioisotope, Radiopharmaceutical, and Biodosimetry, National Research and Innovation Agency, 11 Building, PUSPIPTEK, South Tangerang, Indonesia, 15314.

3Directorate of Facilitation and Monitoring of Regional Research and Innovation, National Research and Innovation Agency, BJ Habibie Building, Jakarta, Indonesia, 10340

4Directorate of Environment, Maritime, Natural Resources, and Nuclear Policy, National Research and Innovation Agency, BJ Habibie Building, Jakarta, Indonesia, 10340

5Research Center of Environment and Clean Technology, National Research and Innovation Agency, 820 Building, PUSPIPTEK, South Tangerang, Indonesia, 15314

6Research Center for Process and Manufacturing Industry technology, National Research and Innovation Agency, 625 Building, PUSPIPTEK, South Tangerang, Indonesia, 15314

6* Corresponding author’s email: [email protected]

DOI: https://doi.org/10.20885/icsbe.vol4.art23

 

 

ABSTRACT

Indonesia’s NDC target, both unconditional and conditional, has not significantly contributed to balancing GHG removals and emissions in three-quarters of the 21st century to keep global temperature increases below 1.5 °C. A more in-depth analysis is needed to reduce GHG emissions to preserve global temperatures at 1.5°C. The AIM-ExSS and AIM/Enduse models analyze Indonesia’s long-term (2050) power mitigation through several scenarios. (i) The BaU (Business as Usual) or baseline scenario assumes no effort to improve energy efficiency or add renewable energy since the base year, resulting in additional electricity needs being met by conventional fossil power plants. CM1: extended-conditional NDC (iii) CM2: Extended-unconditional NDC (iv) CM3 is an ambitious power decarbonization scenario. In 2050, CM1 and CM2 reduced GHG emissions by 22% and 24%, respectively. CM3 potentially reduces 2,422 million tons of CO2e, or 92% of the 2050 baseline emissions. CCS (carbon capture and storage) technology is a key technology for deep decarbonization in the power sector. In addition to geologic sequestration, CO2 bio-fixation by cultivating microalgae can be considered as CCS. This study assessed Airlift-Vertigro bio-reactors to cultivate Botryococcus braunii for CO2 bio-fixation and biofuel (microalgal oil), which can be used to achieve carbon neutrality in the power sector.

 

Keywords: CO2 storage, climate change mitigation, microalgae, renewable energy

 

 

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ANALYSIS OF HEAVY METAL EXPOSURE ON HAIR OF RESIDENTS AROUND GUNUNG TUGEL FINAL DISPOSAL SITE AT BANYUMAS REGENCY

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F M Iresha1*, Kasam1, D S Nuramadhani1, A Rahmat2

1 Program Studi Teknik Lingkungan, Fakultas Teknik Sipil dan Perencanaan, Universitas Islam Indonesia, Yogyakarta

2 Badan Riset dan Inovasi Nasional, Indonesia

[1] *Corresponding author’s email: [email protected]

DOI: https://doi.org/10.20885/icsbe.vol4.art22

 

ABSTRACT

Final Disposal Site (FDS) which is a place that is produced from landfills or the final stage in waste processing. Gunung Tugel FDS which is located in Kedungrandu Village, Patikraja District, Banyumas Regency has a source of waste originating from settlements, markets, shops and also industry of 260 m3/day. The existing facilities at the Gunung Tugel FDS have not been maximized because they use the open dumping method, namely the discarded waste is allowed to accumulate without any further processing other than that there is no leachate or leachate disposal. Leachate that is not treated can infiltrate into the ground and contaminate the surrounding groundwater. The study was conducted to determine the concentration of heavy metals Zinc (Zn) and Chromium (Cr) in the hair of the community around the Gunung Tugel FDS, Banyumas Regency and analyze the relationship between length of stay, source of drinking water consumption and the amount of drinking water consumption with heavy metal content in the community around the Gunung Tugel FDS, Banyumas Regency. The number of samples was determined using the distance of residence from the FDS, namely 16 samples. The distance used has 4 retrieval points and 4 repetitions which are at a distance of 500 meters, 1000 meters, 1500 meters and 2000 meters. The results of the analysis of the concentration of Zn in the hair of the people around the Gunung Tugel FDS reached 85.52 – 339.64 µg/g and the concentration of Cr in the sample was in the range of 1.8±0.3 ppm. At point 1 the average concentration obtained is 609.87 mg/kg, this shows that the closer the distance, the faster the exposure to heavy metals produced by the landfill.

Keywords: Heavy Metal, exposure, disposal

 

 

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OPTIMIZATION OF THE MRICA RESERVOIR MANAGEMENT AT BANJARNEGARA REGENCY USING A DETERMINISTIC DYNAMIC PROGRAM (FOR ELECTRICITY PRODUCTION AND IRRIGATION WATER)

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 A Sastrawan1, L Makrup1, Ruzardi1, and S Fadilah1*

1Department of Civil Engineering, Universitas Islam Indonesia, Yogyakarta, Indonesia

[1]* Corresponding author’s email: [email protected]

DOI: https://doi.org/10.20885/icsbe.vol4.art21

ABSTRACT

Siltation becomes the Mrica reservoir’s main problem that causes the reduction of the effective storage capacity of the dam, so it cannot function properly. This research aims to obtain the optimal Reservoir Operating Rules that can produce maximum electrical power in hydropower and fulfill the irrigation water requirements as designed according to the existing reservoir capacity. The optimization method used in this research is a Deterministic Dynamic Program, assuming the event occurs as a certain occurrence. In this procedure, the existing constraints divide into multi-stages with decision variables at each stage. The analysis starts from a backward to a forward recursive to get the water storage and release maximum used as a recommendation to design the effective Reservoir Operation Rules. It was simulated using three scenarios, including Scenario 1 (Q IR optimization=actual); Scenario 2 (Q IR optimization=design); and Scenario 3(Q IR generate optimization=demand). Based on the benchmarking analysis results, the percentage of design, actual, and optimized Reservoir Operation Rules were 98.08%, 98.29%, and 99.04%, respectively, which indicates the design Reservoir Operational Rules performance is not better than others. Besides that, Scenario 2 has the highest profit of Rp 76350527181 and fulfills regulation No. 7 of 2004 concerning water resources.

 

Keywords : Optimization, Reservoir, Management

 

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